Anodized aluminum case improves iPhone camera with upgraded lens and boom mic Improves video or still shots Works with iPhone 3G or 3GS (However 3G requires additional app to shoot video and the quality is poor) iPhone fits inside included silicone case, then mounts inside the aluminum housing for full protection Constructed from a solid block of milled aluminum Shoe mount on top allows you to add camera accessories (flash will not work, since there is no way to sync it to the iPhone camera shutter) Four screw mounts on the corners of the case enable you to mount to a tripod Comes standard with 37mm lens threading, as well as a 0.45x Wide angle/macro combination lens Add any other lenses with a 37mm mount